Use Vivado to build an Embedded System

Transcription

1 Introduction This lab guides you through the process of using Vivado to create a simple ARM Cortex-A9 based processor design targeting the ZedBoard or Zybo board. Where the instructions refer to both boards, choose the board you are using. You will use Vivado to create the hardware system and SDK (Software Development Kit) to create an example application to verify the hardware functionality. Objectives After completing this lab, you will be able to: Create a Vivado project for a Zynq system Use the IP Integrator to create a hardware system Use SDK to create a standard memory test project Run the test application on the board Procedure This lab is separated into steps that consist of general overview statements that provide information on the detailed instructions that follow. Follow these detailed instructions to progress through the lab. This lab comprises 5 primary steps: You will create a top-level project using Vivado, create the processor system using the Vivado IP Integrator, generate the top-level HDL and export the design to SDK, create a Memory Test application in SDK, and finally, test in hardware. Design Description The purpose of the lab exercises is to walk you through a complete hardware and software processor system design. Each lab will build upon the previous lab. The following diagram represents the completed design (Figure 1). Figure 1. Completed Design In this lab, you will use IP Integrator to create a processing system based design consisting of the following (Figure 2): ARM Cortex A9 core (PS) UART for serial communication DDR3 controller for external DDR3_SDRAM memory ZYNQ 1-1

2 Lab Workbook Figure 2. Processor Design of this Lab General Flow for this Lab Step 1: Create a project using Vivado Step 2: Create Processor System using IP Integrator Step 3: Generate Top-Level HDL and Export to SDK Step 4: Create a Memory TestApp in SDK Step 5: Verify Functionality in Hardware In the instructions below; {sources} refers to: C:\xup\embedded\2015_2_zynq_sources {labs} refers to : C:\xup\embedded\2015_2_zynq_labs Board support for the Zybo is not included in Vivado by default. The relevant files zybo.zip need to be extracted and saved to: {Vivado installation}\data\boards\board_files\zynq These files can be downloaded from either from the Digilent, Inc. webpage ( or the XUP webpage ( ) where this material is also hosted. ZYNQ 1-2

3 1Create a Vivado Project Step Launch Vivado and create an empty project targeting the ZedBoard or the Zybo, using the VHDL language Open Vivado by selecting Start > All Programs > Xilinx Design Tools > Vivado > Vivado Click Create New Project to start the wizard. You will see the Create a New Vivado Project dialog box. Click Next Click the Browse button of the Project Location field of the New Project form, browse to {labs}, and click Select Enter lab1 in the Project Name field. Make sure that the Create Project Subdirectory box is checked. Click Next. Figure 3. Project Name Entry In the Project Type form select RTL Project, and click Next In the Add Sources form, select VHDL as the Target language and Mixed as the Simulator language, and click Next ZYNQ 1-3

4 Lab Workbook Figure 4. Add sources to new project Click Next two more times to skip Adding Existing IP and Add Constraints In the Default Part form, select Boards, and depending on the board you are using, select ZedBoard or Zybo and click Next. Figure 5. Boards and Parts Selection Check the Project Summary and click Finish to create an empty Vivado project. ZYNQ 1-4

5 2Creating the System Using the IP Integrator Step Use the IP Integrator to create a new Block Design, add the ZYNQ processing system block, and import the provided xml file for the board In the Flow Navigator, click Create Block Design under IP Integrator Figure 6. Create IP Integrator Block Diagram Enter system for the design name and click OK Figure 7. Create New Block Diagram IP from the catalog can be added in different ways. Click the Add IP icon in the block diagram side bar, press Ctrl + I, click the Add IP icon in the empty Diagram workspace, or right-click anywhere in the Diagram workspace and select Add IP. ZYNQ 1-5

6 Lab Workbook Figure 8. Add IP to Block Diagram Once the IP Catalog is open, type z into the Search bar, find and double click on ZYNQ7 Processing System entry, or click on the entry and hit the Enter key to add it to the design. Figure 9. Add Zynq block to the design Notice the message at the top of the Diagram window that Designer Assistance available. Click Run Block Automation and select /processing_system7_0 Figure 10. Run block automation In the Run Block Automation window, leave the default settings, including Apply Board Preset checked, and click OK ZYNQ 1-6

7 Figure 11. Block Automation settings Once Block Automation has been complete, notice that ports have been automatically added for the DDR and Fixed IO, and some additional ports are now visible. The imported configuration for the Zynq related to the Zybo board has been applied which will now be modified. Figure 12. Zynq Block with DDR and Fixed IO ports Double-click on the added block to open its Customization window. Notice now the Customization window shows selected peripherals (with tick marks). This is the default configuration for the board applied by the block automation. ZYNQ 1-7

8 Lab Workbook Figure 13. Imported peripherals settings 2-2. Configure the processing block with just UART 1 peripheral enabled A block diagram of the Zynq should now be open again, showing various configurable blocks of the Processing System. At this stage, the designer can click on various configurable blocks (highlighted in green) and change the system configuration. Only the UART is required for this lab, so all other peripherals will be deselected Click on one of the peripherals (in green) in the IOP Peripherals block, or select the MIO Configuration tab on the left to open the configuration form Expand I/O peripherals if necessary, and ensure all the following I/O peripherals are deselected except UART 1. i.e. Remove: ENET 0 USB 0 SD 0 Expand GPIO to deselect GPIO MIO Expand Memory Interfaces to deselect Quad SPI Flash Expand Application Processor Unit to disable Timer 0. ZYNQ 1-8

9 Figure 14. Selecting only UART Select the PS-PL Configuration tab on the left Expand AXI Non Secure Enablement > GP Master AXI interface and deselect M AXI GP0 interface Expand General > Enable Clock Resets and deselect the FCLK_RESET0_N option Select the Clock Configuration tab on the left. Expand the PL Fabric Clocks and deselect the FCLK_CLK0 option and click OK. Click on the (Regenerate Layout) button and see the following block diagram. Figure 15. Updated Zynq Block Click on the (Validate Design) button and make sure that there are no errors. ZYNQ 1-9

10 Lab Workbook 3Generate Top-Level and Export to SDK Step Generate IP Integrator Outputs, the top-level HDL, and start SDK by exporting the hardware In the sources panel, right-click on system.bd, and select Generate Output Products and click Generate to generate the Implementation, Simulation and Synthesis files for the design (You can also click on Generate Block Design in the Flow Navigator pane to do the same) Right-click again on system.bd, and select Create HDL Wrapper to generate the top-level VHDL model. Leave the Let Vivado manager wrapper and auto-update option selected, and click OK The system_wrapper.vhd file will be created and added to the project. Double-click on the file to see the content in the Auxiliary pane. Figure 16. The HDL Wrapper file generated and added to the project Notice that the VHDL file is already Set As the Top module in the design, indicated by the icon Select File > Export > Export hardware and click OK. (Save the project if prompted) Note: Since we do not have any hardware in Programmable Logic (PL) there is no bitstream to generate, hence the Include bitstream option is not necessary at this time. Figure 17. Exporting hardware Select File > Launch SDK leaving the default settings, and click OK ZYNQ

11 Figure 18. Launch SDK SDK should now be open. If only the Welcome panel is visible, close or minimize this panel to view the Project Explorer and Preview panel. A Hardware platform project should have been automatically created, and the system_wrapper_hw_platform_0 folder should exist in the Project Explorer panel. Figure 19. SDK C/C++ development view The system.hdf file (Hardware Description File) for the Hardware platform should open in the preview pane. Double click system.hdf to open it if it is not. Basic information about the hardware configuration of the project can be found in the.hdf file, along with the Address maps for the PS systems, and driver information. The.hdf file is used in the software environment to determine the peripherals available in the system, and their location in the address map. ZYNQ 1-11

12 Lab Workbook 4Generate Memory TestApp in SDK Step Generate memory test application using one of the standard projects template In SDK, select File > New > Application Project Name the project mem_test, and in the Board Support Package section, leave Create New selected and leave the default name mem_test_bsp and click Next. (Note that this application will run on ps7_cortexa9_0 i.e. core 0 of the two processor cores available.) Figure 20. Create new SDK application project Select Memory Tests from the Available Templates window, and click Finish. ZYNQ

13 Figure 21. Creating Memory Tests C Project The mem_test project and the board support project mem_test_bsp will be created and will be visible in the Project Explorer window of SDK, and the two projects will be automatically built. You can monitor the progress in the Console panel Expand folders in the Project Explorer view, and observe that there are three projects system_wrapper_hw_platform_0, mem_test_bsp, and mem_test. The mem_test project is the application that we will use to verify the functionality of the design. The hw_platform includes the ps7_init function which initializes the PS as part of the first stage bootloader, and mem_test_bsp is the board support package. Figure 22. The Project Explore view Open the memorytest.c file in the mem_test project (under src), and examine the contents. This file calls the functions to test the memory. ZYNQ 1-13

14 Lab Workbook 5Test in Hardware Step Zybo: Make sure that the JP7 is set to select USB power and JP5 is set to JTAG mode. Connect the board with a micro-usb cable and power it ON. ZedBoard: Make sure that two micro-usb cables are used between the PC and the PROG and the UART connectors of the board and that the board is placed in the JTAG mode (MIO6-MIO2 jumpers are in the Dn position). Establish the serial communication using SDK s Terminal tab Zybo: Make sure that the JP7 is set to select USB power, and JP5 is set to JTAG. Make sure that a micro-usb cable is connected to the JTAG PROG connector (next to the power supply connector). Turn ON the power. ZedBoard: Make sure that two micro-usb cables are used between the PC and the PROG and the UART connectors of the board and that the board is placed in the JTAG mode (MIO6-MIO2 jumpers are in the Dn position). Turn ON the power Select the tab. If it is not visible then select Window > Show view > Terminal Click on and if required, select appropriate COM port (depends on your computer), and configure it with the parameters as shown. Figure 23. SDK Terminal Settings ZYNQ

15 You can find the COM port from the Windows Device Manager, in this case, COM6: Figure 24. COM ports in Windows control panel 5-2. Run the mem_test application and verify the functionality In SDK, select the mem_test project in Project Explorer, right-click and select Run As > Launch on Hardware (GDB) to download the application, and will execute ps7_init, and then execute mem_test.elf (user application). Figure 25. Launch Application You should see the following output on the Terminal tab. Figure 26. SDK Terminal Output Close SDK and Vivado by selecting File > Exit in each program. Conclusion Vivado and the IP Integrator allow base embedded processor systems and applications to be generated very quickly. After the system has been defined, the hardware can be exported and SDK can be invoked from Vivado. Software development is done in SDK which provides several application templates including memory tests. You verified the operation of the hardware by downloading a test application, executing on the processor, and observing the output in the serial terminal window. ZYNQ 1-15